SINUS PENTA
GUIDE TO THE
REGENERATIVE APPLICATION
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150
Normally, if multiple motor drives are connected, the continuous power and the overload power are
considered as the sum of the power of each motor drive. The dimensioning of the regenerative drive can be
reduced when ore or more drives operate only as motors or only as generators.
The regenerative drive power is as follows:
Preg=1.73*Vacmin* Imax
where Vacmin is the min. mains voltage
The power transferred when the regenerative drive is overloaded is the following:
Pmaxreg=1.73*Vacmin* Imax
These values are given in the specification tables above.
EXAMPLE:
Dimensioning the regenerative drive for a motor drive unit including a SINUS PENTA 0020 4T and a 15kW,
4-pole motor.
Motor features:
Type: 4-pole MJ 160L
Rated power (mechanical power): 15kW
Efficiency: 0.91
Rated voltage: 400V
Rated current: 28.1A
Power factor: 0.85
Drive:
SINUS PENTA 0020 4T
Rated current: Inom=30A
Peak current: Ilim=36A
Rated mains voltage: 400VAC
Pconrgn= Pmot + motor drive regenerative drive losses
Pmot= Mechanical power/motor efficiency
or
Pmot=1.73*Vmot*Imot*power factor
Both methods result in
Pmot=16.5kW